Reference : Sensor arrays : an inspired idea or an objective measurement of environmental odours ?
Scientific journals : Article
Life sciences : Environmental sciences & ecology
http://hdl.handle.net/2268/23589
Sensor arrays : an inspired idea or an objective measurement of environmental odours ?
English
Stuetz, R. M. [> >]
Nicolas, Jacques mailto [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Surveillance de l'environnement >]
2001
Water Science & Technology
IWA Publishing
44
9
53-58
Yes (verified by ORBi)
International
0273-1223
London
United Kingdom
[en] electronic nose ; odours ; olfactometry ; odour assessment ; sewage
[en] The measure of annoyance odours from sewage treatment, landfill and agricultural practise has
become highly significant in the control and prevention of odorous emissions from existing
facilities and is crucial for new planning applications. Current methods (such as GC-MS analysis,
H2S and NH3 measurements) provide an accurate description of chemical compositions or act as
surrogates for odour strength, but tell us very little about the perceived effect, whereas
olfactometry gives the right human response but is very subjectivity and expensive. The use of
non-specific sensor arrays may offer an objective and on-line instrument for assessing olfactive
annoyance. Results have shown that sensor array systems can discriminate between different
odour sources (wastewater, livestock and landfill). The response patterns from these sources can be significantly different and that the intensity of sensor responses is proportional to the
concentration of the volatiles. The correlation of the sensors responses against odour strengths
have also shown that reasonable fits can be obtained for a range of odour concentrations (100 -
800,000 ou/m3). However, the influence of environmental fluctuations (humidity and temperature) on sensor baselines still remains an obstacle, as well as the need for periodic calibration of the sensory system and the choice of a suitable gas for different environmental odours.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/23589

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